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<div class="content" data-ice="content"><h1 data-ice="title">src/toolbar/HideMode.js</h1>
<pre class="source-code line-number raw-source-code"><code class="prettyprint linenums" data-ice="content">import {Controller} from &quot;../Controller.js&quot;;
import {math} from &quot;@xeokit/xeokit-sdk/src/viewer/scene/math/math.js&quot;;

function closeEnough(p, q) {
    const CLICK_DIST = 4;
    return (Math.abs(p[0] - q[0]) &lt; 4) &amp;&amp; (Math.abs(p[1] - q[1]) &lt; CLICK_DIST);
}

/** @private */
class HideMode extends Controller {

    constructor(parent, cfg) {

        super(parent, cfg);

        if (!cfg.buttonElement) {
            throw &quot;Missing config: buttonElement&quot;;
        }

        const buttonElement = cfg.buttonElement;

        this.on(&quot;enabled&quot;, (enabled) =&gt; {
            if (!enabled) {
                buttonElement.classList.add(&quot;disabled&quot;);
            } else {
                buttonElement.classList.remove(&quot;disabled&quot;);
            }
        });

        this.on(&quot;active&quot;, (active) =&gt; {
            if (active) {
                buttonElement.classList.add(&quot;active&quot;);
            } else {
                buttonElement.classList.remove(&quot;active&quot;);
            }
        });

        buttonElement.addEventListener(&quot;click&quot;, (event) =&gt; {
            if (!this.getEnabled()) {
                return;
            }
            const active = this.getActive();
            this.setActive(!active);
            event.preventDefault();
        });

        this.viewerUI.on(&quot;reset&quot;, () =&gt; {
            this.setActive(false);
        });

        this._initHideMode();
    }

    _initHideMode() {
        var entity = null;
        this._onHover = this.viewer.cameraControl.on(&quot;hover&quot;, (e) =&gt; {
            if (!this.getActive() || !this.getEnabled()) {
                return;
            }
            if (entity) {
                entity.highlighted = false;
                entity = null;
            }
            entity = e.entity;
            entity.highlighted = true;
        });
        this._onHoverOff = this.viewer.cameraControl.on(&quot;hoverOff&quot;, (e) =&gt; {
            if (!this.getActive() || !this.getEnabled()) {
                return;
            }
            if (entity) {
                entity.highlighted = false;
                entity = null;
            }
        });
        const lastCoords = math.vec2();
        this._onMousedown = this.viewer.scene.input.on(&quot;mousedown&quot;, (coords) =&gt; {
            lastCoords[0] = coords[0];
            lastCoords[1] = coords[1];
        });
        this._onMouseup = this.viewer.scene.input.on(&quot;mouseup&quot;, (coords) =&gt; {
            if (!this.getActive() || !this.getEnabled()) {
                return;
            }
            if (entity) {
                if (!closeEnough(lastCoords, coords)) {
                    entity = null;
                    return;
                }
                entity.visible = false;
                entity.highlighted = false;
                entity = null;
            }
        });
    }
}

export {HideMode};</code></pre>

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